Germination percentage: the share of seeds in a tested sample that produce normal seedlings under standard conditions. Physical purity: the proportion of the sample that is seed of the stated crop, free of weed seed, other crop seed, and inert matter. Moisture content: the weight of water in the seed as a percentage, and the key predictor of storage life.
Off-type: a plant that differs from the described variety and signals impurity. Isolation distance: the minimum gap required between a seed crop and other crops of the same species to prevent cross-pollination. Lot: a defined quantity of seed, uniform within stated tolerances, identified by a single number for testing and traceability.